410 ADDENDA. 



forks curviag back towards the body anteriorly and 

 posteriorly. These are the hairs from the piliferous 

 spots. Hairs on the body black, hairs on the head and 

 joint 2 white and not furcate. Head jet black ; joint 2 

 pale yellow-brown with a black transverse bar just back 

 of the middle of the joint ; dark along the sides ; tho- 

 racic feet black. There are eight hairs in pairs on the 

 dorsal bar of joint 2. Duration of this period two or 

 three days. 



After First Moult. — Length .15 inch. Shape not 

 materially changed. Head and joint 2 jet black ; hairs 

 all white, shorter than before, more numerous, the end 

 capitate instead of bifid ; head and neck corrugated. 

 Duration of this period six days. 



After Second Moult. — Length .40 inch. Marked as 

 before ; hairs still capitate, white ; a dorsal and subdor- 

 sal line a little more plainly green ; head and joint 2 

 profusely tairy, but the hairs are all short, surface cor- 

 rugated. Previous to this moult the larvae mostly lay 

 coiled on the surface of the food-plant, but now they 

 straighten out under a thin silky covering. Duration of 

 this period four days. 



After Third Moult. — Length .50 inch. Cylindrical ; 

 head about the same width as the body ; black, covered 

 with white hairs, each of which has about six short side 

 spurs from about the middle up ; joint 2 black, with the 

 dorsal bar red-brown with a whitish margin ; hairs on this 

 joint of two kinds, short and long, the long about one- 

 sixth the width of the body in length and very shallowly 

 trifid at the end ; body, each joint with five folds, the 

 anterior twice the width of the others ; two forms of 

 hairs, one very short and the other long, each long one 



